M16C Datasheet, PDF (143/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Preliminary Specifications REV.B
Mitsubishi microcomputers
Specifications in this manual are tentative and subject to change.
M16C / 6N Group
UCAloRckT2asSypnecchiraolnMooudseseRreiaglisI/tOer(U2 ART) mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Bit 0 of the UART2 special mode register 2(address 01F616) is used as the I²C mode selection bit 2. Table
13-6 shows the types of control to be changed by I²C mode selection bit 2 when the I²C mode selection bit
is set to "1". Table 13-7 shows the timing characteristics of detecting the start condition and the stop
condition. Set the start/stop condition control bit (bit 7 of UART2 special mode register 2) to "1" in I²C mode.
Table 13-6. Functions changed by I²C mode selection bit 2
Function
IICM2 = 0
IICM2 = 1
1 _{Factor of interrupt number 15}
No acknowledgment detection (NACK) UART2 transmission (the rising edge
of the final bit of the clock)
2 Factor of interrupt number 16
Acknowledgment detection (ACK)
UART2 reception (the falling edge
of the final bit of the clock)
3 _{DMA1 factor at the time when 1 1 0 1 Acknowledgment detection (ACK)}
is assigned to the DMA request
factor selection bits
UART2 reception (the falling edge of
the final bit of the clock)
4 Timing for transferring data from the The rising edge of the final bit of the
UART2 reception shift register to the reception clock
reception buffer.
The falling edge of the final bit of the
reception clock
5 ^{Timing for generating a UART2}
reception/ACK interrupt request
The rising edge of the final bit of the
reception clock
The falling edge of the final bit of the
reception clock
Table 13-7. Timing characteristics of detecting the start condition and the stop condition
3 to 6 cycles < duration for setting-up (Note2)
3 to 6 cycles < duration for holding (Note2)
Note 1 : When the start/stop condition count bit is "1" .
Note 2 : "cycles" is in terms of the input oscillation frequency f(XIN) of the main clock.
SCL
SDA
(Start condition)
SDA
(Stop condition)
Duration for
setting up
Duration for
holding
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